So, after much consternation, I have decided that it is high time to retire my battle-scarred Mighty Defender. It's served me well over the past few months, but I feel it's time to move on. I'm highly hesitant to go Owlite, as everyone and their mother seems to have one, and I'm rather annoyed by people who tell me "Durr, Owlite ony sheeld hurr durr.", and I just don't like the thing's look anyway.
So, what to pick?
Thus far, I've picked out a few options:
-Upgrade to a Heater Shield. I've heard elemental resistance is good on a shield, and from experience I'm inclined to agree. With Normal and Elemental resistance combined with the fact that it's 5* and I've got the prereq for it, I'm almost inclined to go for it.
-Build up a Skelly Shield. Shadow-dmg enemies are the bane of my existence at the moment, with the ever-annoying Devlites and evasive Kats constantly smashing my poor Defender. I would be upgrading this to 4* at the earliest opportunity.
-Build up a Plate Shield. I've heard good things about the Volcanic variant of this line, and it's not the Owlite. Based upon the bars, which I know are often wrong, this shield line should perform adequately no matter what quadrant of the 'works I end up in. I'd love to hear how the Plate line stacks up to comparable shields, how many hits from a gun puppy I'd be sacrificing for however many hits from a devlite, etc.
-Just run FSC like mad and get a Blackened Crest. The rationale behind this is the same as that for the Skelly, although I have yet to do much in T3 at all, let alone actually run FSC. I hate being "That Guy", so this is a long shot, at best.
For background, I mostly run a musketeer-type loadout, as in single-sword single-gun, with the latest combo I've tried being the Dark Thorn Blade with a Kilowatt Pulsar. My armor is Miracle Hood/Sunset Duster, with intent to go Divine Veil/Shadowsun Slicker.
If you want to run T3, you'll probably want a shield for each type of damage.
As for Heater Shield vs Owlite Shield, there is a reason Owlite shield is prefered in most case. They both have elemental resist, so as you point, elemental resistance is good on a shield. The main difference is the status effect resistance. Heater shield as a freeze resistance. While this is annoying, that's a lot less than Fire (you can't shield fire damage) and Shock (which incapacitate you for a second), and Owlite has both of those resistance. That's why you WANT an Owlite shield for most situation. Well, a Heater shield will perform better in an Ice Stratum, but there are more Fire and Shock.
As for a Shadow resistance shield, you basically have two choices : Skelly or Blackened Crest. The real question is : are you able to run FSC enough to have the Blackened ? As for Owlite vs Heater, the Blackened seem to be the better solution because of status effect resistance, but is harder to obtain.
For the Plate Shield, I also heard a lot of good things, but I'll let someone more experienced answer you.
As for the last type of resistance, piercing, only beast and slimes do piercing damage, and they are not the worst enemy to face, so I think, for the moment, you can forget about it.